Having successfully sealed the rift at Shadowfell Keep and defeated the necromancer Kalarel and his minions, the Heroes of Winterhaven enjoy a brief respite in the central city of the Nentir Vale, Setherton.
But news of a slaver ring comes to Brego's ears. Mandar has mysteries to unwind, and Vlastimil's mentor has asked him to look into a possible renegade mage. Heidi's betrothed is rumored to be confronting a band of dark dwarves, "duergar." All these things are happening in one place: Thunderspire Mountain. Is it chance? Or is it fate?